Filter material



FIG. 1 is a front view of a filter material showing my new design;

FIG. 2 is an enlarged fragmentary cross-sectional view thereof, taken along line 2—2 of FIG. 1;

FIG. 3 is a front view of a second embodiment of my new design;

FIG. 4 is an enlarged fragmentary cross-sectional view thereof, taken along line 4—4 of FIG. 3; and,

FIG. 5 is a rear view of the filter material, which is identical for both embodiments. 

The ornamental design for a filter material, as shown and described. 